I am approximately 64 year old man, I always wash myself with water after doing Hajaat(shit). But lately, I see brown colored spot on my underwear, when I go next time to use the bathroom. I think the spot is from colored water that was left on me after washing myself. After seeing this spot should I consider myself Najis?? can I not do wazu and pray while there is a brown spot on my underwear?
Will appreciate your help, I have been changing underwear and cleaning myself over and over again before I pray.
Please let me know. Thank You